look directly at a dot, it vanishes.
This reminds me of the plastic trays airlines used to serve food on-- at one time they were quite large, to hold a full meal! Other color ways: Rounded Blue Yellow and Gold Confused Bricks (http://www.spoonflower.com/designs/4918580) Confused Bricks in Aqua, Sage, Sand and Slate (http://www.spoonflower.com/designs/4918532) Rounded Bright Confused Bricks Half Brick (http://www.spoonflower.com/designs/4918519) Optical Illusion Confused Bricks Half Brick (http://www.spoonflower.com/designs/4918512) Confused Bricks with Black Grout Half Brick (http://www.spoonflower.com/designs/4918487) Confused Bricks Brown Green and Blue, Half Brick (http://www.spoonflower.com/designs/4918466)